发明授权
US3684442A Process for removing carbon dioxide from a crude ammonia synthesis gas in a combined system for producing ammonia and urea
失效
从生产氨和尿素的组合系统中将氨二恶烷从合成氨合成气中除去的方法
- 专利标题： Process for removing carbon dioxide from a crude ammonia synthesis gas in a combined system for producing ammonia and urea
- 专利标题（中）： 从生产氨和尿素的组合系统中将氨二恶烷从合成氨合成气中除去的方法
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申请号： US3684442D申请日： 1970-02-06
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公开(公告)号： US3684442A公开(公告)日： 1972-08-15
- 发明人: KONOKI KEIZO , OHSAKI KOZO
- 申请人： TOYO ENGINEERING CORP , MITSUI TOATSU CHEMICALS
- 专利权人： Toyo Engineering Corp,Mitsui Toatsu Chemicals
- 当前专利权人： Toyo Engineering Corp,Mitsui Toatsu Chemicals
- 优先权： JP958169 1969-02-08
- 主分类号： C07C67/00
- IPC分类号： C07C67/00 ; C07C239/00 ; C07C273/10 ; C10K1/16 ; C01C1/04 ; C01B2/30 ; C07C127/00
摘要：
A CRUDE AMMONIA SYNTHESIS GAS IS PASSED THROUGH A SCRUBBING ZONE IN WHICH IT IS CONTACTED BY A SCRUBBING SOLUTION COMPRISING LIQUID AMMONIA AND A SUBSTANCE FOR ASSISTING THE DISSOLUTION OF AMMONIA CARBAMATE, WITH THE AMMONIA BEING SUPPLIED AT A RATE SO THAT THE MOLAR RATIO OF NH3/CO2 IN THE SCRUBBING SOLUTION ADJACENT THE DISCHARGE END OF THE SCRUBBING ZONE IS AT LEAST 3,0:1, PREFERABLY 4.0:1 TO 20.0:1. RESIDUAL CARBON DIOXIDE IN THE AMMONIA SYNTHESIS GAS LEAVING THE SCRUBBING ZONE CAN BE REMOVED BY ADDING WATER OR AN AQUEOUS SOLUTION THERETO AND/OR BY SUBJECTING SAID GAS TO A METHANIZATION REACTION. HEAT IS REMOVED FROM SAID GAS, BY INDIRECT HEAT EXCHANGE, ONLY AFTER SUBSTANTIALLY ALL OF THE CARBON DIOXIDE HAS BEEN REMOVED THEREFROM.
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